Turn over a new leaf ( নূতনের সূচনা ) After his failure he turned over a new leaf.
when pigs fly ( কখনও না ) I will help you when pigs fly
Cut to the quick ( মর্মাহত হওয়া ) I was cut to the quick by his words.
A blessing in disguise ( বিপরীতে হিত ; প্রথমে খারাপ হিসেবে মনে হলেও পরবর্তীতে ভালো হয় ) Sam's motorcycle accident was a blessing in disguise because he got enough insurance money.
In a nut shell ( খুব সংক্ষেপে ) Tell the story in a nut shell.
In the mean time ( ইতিমধ্যে ) Lila will come here to-night. In the mean time you should get her room ready.